On 1/18/17 8:04 PM, Gerhard Hoffmann wrote:
Am 18.01.2017 um 22:12 schrieb Bob Camp:
Yeah, but it's easier (cheaper if you're paying for labor) just to
buy a box of 10 filters at $30/each and stack them
Be *very* careful cascading those Min-Circuits filters without putting
some sort of isolation between them. You can get all
sorts of wonky results as the reactances in one mis-terminates the
reactances in another.
Bob
But you can be quite lucky:
1 SLP15+ filter (15 MHz Low pass):
<
https://www.flickr.com/photos/137684711@N07/31554251684/in/album-72157662535945536/
3 filters cascaded
<
https://www.flickr.com/photos/137684711@N07/32019253490/in/album-72157662535945536/
And the SLP10.7+ is very similar, except the 3dB down is around 13.5
MHz, and it's down 33 dB at 20 MHz.
As a practical matter, a chain of two SLP10.7 knocks the harmonics from
a Wenzel streamline down below the broadband noise floor when measured
with a system with 4 dB NF.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
